No, you won't be able to use CAAT. That's entirely different structures of animation and setup.
I know where your coming from. However, I did some research into this myself on the the technical level and found some nifty things.
Spriter for C2 uses DOMParser, which is just modifies the xml string into a window document. The Window Document is still mostly a string. Spriter uses browser based xml parser functions to go through the string to get the relavant information. SpC2 uses only about 3 functions to do the job and only does it once to load the object.
Since it is only string based parsing it will be doable to create an alternative set of loose ends for CJS so that Spriter will work in CJS.
I have a plan, but won't be working on it until the end of the month. I'll make a post in the Spriter thread when I have more on it. But even though CJS and Spriter won't do anything about it. doesn't mean we are completly lost :)